Tool holder



NOV. 19, 1929. L E 1,736,210

TOOL HOLDER- Filed Qct. 11, 1926 2 Sheets-Sheet l fie 1 scription.

Patented -Nov. 19, 1929 UNET' FRANKR IL EEOF MEADFVILLE, PENNSYLVANIA" T OL: LYD l A bplication filed fot' 'b'erf 11, 1956; semi N6; 140,875.

I This invention" relates to "tool holders of the inserted blade typeand an important object is to provide novel and reliablemeans whereby the blades are held in adj usted position against the thrust to'which the same are subjectedinuse. V j

More specifically anobj ect of the invention is to provide a simple arrangement by which the thrust' on the blades is employed to more firmly hold the blades in place. 7 I Other objects and advantages will be apparent during the course'of the following de- In the accompanying drawings forming a part of this application and in which like'nu- 'merals are employed to designate like'part'sc trating a modification of the invention. a

Figure 7 is a'detail sectional View'illustrating a slightly different formjo finvention,

Figure 8 is a similar view illustrating another modification of the lnventlon. Figure9 is a deta l sectional YlW lllllS- trating a still fi lr'ther'modifi'cation of the vention.

In the drawing the numeral 10 designates a carrier or body having aseries of slots 11 for thereception ofblades l2. 'Each blade has the inner edge or surface thereof engaged by a tapered wedgej 14 so that the blade is driven outwardly into binding engagement with the convergingside Walls of the slots as clearly shown in F igure 8. i T j Particular attention isinvitecLto Figures 2and' 3" Which illustrate that the wedgell is received-in registering grooves'l5 and 16 in the bottom wall ofthe slot and the. inner edge of the blade; This arrangement holds the Wedgea gainstla'teral movement; 5 Figure 2 clearly; illustrates that the opposed active faces of'the grooves 15; and 16 are inclin'ediin thefsamelgeneral' direction to intersect the I);

line of thrust on the blade. The activeiace F of the groove '16 extends at a ,greater'angle tofthe line of thrust tli'andoes the active face of the groove 15;, By this arrangement rearward movement ofthe wedge islinhibited by l v f the" inclination of thejbottom wall of theffi groove l5 and. rearward movement. of :the blade itselfin responselto the thrust thereon is resisted by the opposed activejcontactingraces of the groove 16 and the wedge; V

example the e; of the active fa e its .7

pthegrd0 e 5 might be 3 degrees and the active face of the groove 16 might, be 6 degrees. In such a vcase the included angle of the wedge 14 would be; 3 degrees to cause the wedge to. impart radial movement to the, blade I and thereby force the same into'tight ment with the walls-of the slot Consideration.of-Figure-2willclearly show that thebottom active face ofzthe groove 15 extends at an angle: to the line-of thrust on the bladeand therefore preventsthe wedge from moving rearwardly in) response to the thruste Further considerationjof. this figure will-show, that ifthe blade ;islto yield to the thrust itmust ride up on the inclined faceof i the wedge 14; I The interlocking connection between the blade and the-carrier prevents this. In other words; a, the. converging side I walls ofthe slot andQthe-, bladeiwill inhibit 3 e radial movement of the blade and since such radial movement is inhibited therecan rearward movement ofthe blade. 1

r In summarizingthis phase of the invention it is pointed out that the activefaces engaged by the wedge 14;slopein thesa ne general) ,directiOnQbut at difl'erentangles to the line of thrust on the blade and in -fact intersect the plane of thew outeredgeof theblade'at-a point rearward-1y of the: blade, thereby probe 'no' ducing a construction by. which end thrust actually has, theefiect of more securely bindi in'g the blade and the wedge in their proper positionsin theslot. f 1 l Figure'f3-;illustrates a'practical meansfor I holdingthe blade against outward radial I I a one sidewall of the slot andthe opposed face f'lO V to. hold the blade against outward radial of thejblade prowide dyvith amatchii1g tQpgue and groove connection 18; It' is believed to be obvious that such a tongue and grooveconnection holds the blade. against: outward: radial. r, movement and therefore performs the same mechanical function asthe converging sidewalls of the Figure 2. 7

F e 5 llu trates. t a iit s also. pess bl movement by the pr v sion" ffgrooves' 1,9 in np sed' sid'e' fifths-slu 'andrthe blade. to defin a han i' h ec p i n lq i W12 is s'appar nt h t yd b th niwl'm ans my e emrl yd? q d the blade against outward radial'movement.

In the forms ofinventi'on shown in Figures l to inclusive, the wedg'eis introduced from the rear side of the cutter;

In the form shownin Figuref fi the: wedge 24 1s introduced from"the-forwarder front 7 28* of the, blade andithe slot respectively apj side of 'th'ef cutter 'andis, intended to, inhibit forward-shifting of the bljade'26 as a result of the thrust'thereon; I'njthi's figure it is shown'tl'i'atfthe opposed active faces 27 and preach-the plane of theouteredge of'the bladeinth'e samengeneral direction, butat different' anglesto define a ta ering-sock t. f'or thereception of thewedge'24. The differenta-ngle s'of the f'aces 2i' andf'28 hold the wedge and the blade against" shifting in. onedirect-ion-in the same "manneras does the-construction shown: in Ffigures' 1, to 3' in;

cl g s-ivel The thrust iir'the other direction is,

"inzthis case, taken by; nut QQfthreaded I tamthebody-,or-carrier and engaged with the bladeattherear-end thereof --It'iwi11b see'nEtha-t 'the'wedge 24 takes-the thrust one di met-ion while the ;nut- 29" takes thethrust' in theotherdirectiomf However, "tis entirely 1 within the Hinge IO f theinvention to employ fso' ,v. U wedge 24 m taking-the thrust in one-direct on f the nut- 295 to supplement the-actionof: the

In the form, of invention shown in Figure 7 the wedge 30 isintroduced; from thefront; of

I the:cutter into'the-registering grooves 31 and BQjn't-he inneredge ofthe; blade and the bot= tom of the slot'frespectiyely to inhibit rear "wardshifting of the blade; TheaCtive faces (if-"the groovesBland T32 slope in the same "general. direction, but at;slightlydiiferent 1 "angles andintersectthe'planeLiin which the outer edge ,cftheblade disposed tof resi'st rearward movementofthe blade. Notlwithstanding the fact; that the hlflstjis iiicthe blade and theslot as Sl 1OW,I,1.i

Y '8 and in explaining this it is pointed out that of agpa-ir of wedges 37 introduced from the.

rear side of the cutter. Grooves or recesses 38 cooperate with the recesses 36 in the formation.of taperingsockets for the reception of the wedges 37 The double angle feature as described in'the form of invention shown in Figures 1 to 3 nclusive 1s shownin Figure the active faces for engagement by" each M g xt ndi nth same general. direc on, but Eit slightly] dii i rent i hglfl Q the i e ofv thrust, to. inhibit endfwise 's shi'fting of the blade and'tlie; wedge; Figure 8, clearly illus trates that the pairs of; opposed faces; as

tend in opposite, 'direfltionsifsof that thrust from either direction. is, prevented from changing the positionof theblade. v

In the formbf inventionshown in Figure 9 hewedge's 450, areintrod'uced from opposite si-desoffthe, cutter and contact with separate pairs of opposed faces 41 and 42in the.b 1ade and thecarr ier, respectively, These. active" faces are'ili. recesses in, theblade'and', the. cutter and ap oach BlIQPlELIlQ/Of the outer edge of the "bla e at sli'ghtl'y'difierenti angles to PR QRQQ thqpeculiar, binding action heretofore describechin",Cletaill r Of;course the,sidewalksofthe slots shown in Figures 7, 8, andg9l converge towardthe periphery of the cutterfto inhibit outward.

radial movement ofthef, blades orany' other m s eprovidd oi h u -11 llf i r Havingthus idScribed the; invention what is claimedJs lyAjrotfaryi cutter comprising abody a blade carried, thereby, said blade and said body 'being providedfwith separate pairs of 7 active face? approaching the plane of the outer edgeof the blade in different directions,

' the faces offeach pair beingatslightlydifl'er efnt angles, and'separate wedges "engaged with 7 said pairsjof faces";

2. A1 rotary cutter comprising a body, a

Blade carried thereby, said" blade and said body being-provided Withseparate pairs: of active; faces approaching; the planefof the outer edge ofthe blade in; difi'erent directions, the f'ace s of each pair beingat slightly differ;- ent angles toeach'other, and'ti'lt'ed'in the same general direction, and separate wedges engaged'with. said pairs of faces and being in troduced into the cutter from the same 'side; 3.,A; rotary cutter comprising a body, a

b13 16;icitrriedhthereby, said blade and said body beingprovided' withgseparat'epairs of' 7 active ff'ac es approaching the plane v. ofjthe outer edge of the blade from opposite ends faces.

of theblades, one face of one pairof faces being at an angle to the other face of that pair, and wedges engaged with said pairs of L A cutter comprising a body having a slot, a blade in the slot, and a wedge between the blade and the bottom of the slot and having inner and outer bearing surfaces inclined outwardly in the same general direction with respect to the line in which the blade is prone to shift under the influence of the thrust'thereon, there being means inhibiting outward movement of the blade, said blades and body having cooperating recesses to receive the wedges. V

5. A cutter comprising a body having aslot, ablade in the slot, the bottom of the blade and the bottom of the slot being formed with opposed recesses, a wedge in'said recesses, there being means to inhibit outward movement of the blade, said means cooperating with the wedge to inhibit endwise shifting of the blade.

' 6. A cutter comprising a body having a slot, a blade in the slot, the bottom of the blade and the bottom of the slot being formed with recesses, and a wedge in said recesses, there being means to inhibit outward movement of the blade, the inner and outer surfaces of the wedge being positioned to cooperate with the means to inhibit outward movement of the blade in resisting endwise shifting of the blade under the influence of the thrust thereon.- I

7. A cutter comprising 'a body having a slot provided with a bottom surface tilted outwardly toward one end, a wedge engaging said tilted bottom surface and having an outer surface tilted in the same general direction as the bottom surface of the slot, and a blade seating on said wedge, there being means inhibiting radial movement of the blade and thereby cooperating with the aforesaid tilted surfaces in resisting endwise shifting of the blade in one direction.

8. A cutter comprising a body having a slot provided with a bottom surface tilted outwardly toward the rear end of the body,

' a wedge engaged with said outwardly tilted bottom surface and having an outer surface tilted outwardly toward the rear end of-the cutter, a blade engaged with the tilted outer surface of-the wedge, there being'means inhibiting radial movement of the blade and thereby cooperating with said outwardly tilted surfaces in resisting endwise shifting of the blade and the wedge in the same direction under influence of the blade thrust.

In testimony whereof I aifiX my signature.

FRANK P. MILLER. 

